FR564701A - Improvements to telephone headsets - Google Patents

Improvements to telephone headsets

Info

Publication number
FR564701A
FR564701A FR564701DA FR564701A FR 564701 A FR564701 A FR 564701A FR 564701D A FR564701D A FR 564701DA FR 564701 A FR564701 A FR 564701A
Authority
FR
France
Prior art keywords
telephone headsets
headsets
telephone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Bernard-Paul-Eugene Perquer
Andre-Cesar Verlynde
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR564701A publication Critical patent/FR564701A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR564701D 1923-04-05 1923-04-05 Improvements to telephone headsets Expired FR564701A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR564701T 1923-04-05

Publications (1)

Publication Number Publication Date
FR564701A true FR564701A (en) 1924-01-09

Family

ID=8945942

Family Applications (1)

Application Number Title Priority Date Filing Date
FR564701D Expired FR564701A (en) 1923-04-05 1923-04-05 Improvements to telephone headsets

Country Status (1)

Country Link
FR (1) FR564701A (en)

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